Hardcoded default domain svc.cluster.local

[54nd20]

Describe the bug
The DNS suffix svc.cluster.local is hardcoded, for instance in:

argocd-operator/controllers/argocd/util.go

Line 629 in d424ebd

return fmt.Sprintf("%s.%s.svc.cluster.local:%d", nameWithSuffix(service, cr), cr.Namespace, port)

Because of this the operator can not be used on clusters where the default domain is different. For instance on Exoscale SKS a default domain like svc.CLUSTER_ID.cluster.local is used.

To Reproduce
Steps to reproduce the behavior:

1. Deploy operator on a cluster with non-default dns suffix
2. DNS resolution will fail for Domains like argocd-repo-server.argocd.svc.cluster.local or argocd-redis.argocd.svc.cluster.local

Expected behavior
Default domain should be configurable for clusters that use a non-default configuration